Thanks R_Kelly:
Adobe Photoshop Elements Version: 12.0 (12.1 (20140303.12.1.49334)) x32
Operating System: Windows Vista 32-bit
Version: 6.0 Service Pack 2
System architecture: Intel CPU Family:6, Model:15, Stepping:11 with MMX, SSE Integer, SSE FP, SSE2, SSE3
Physical processor count: 4
Processor speed: 2400 MHz
Built-in memory: 3069 MB
Free memory: 1631 MB
Memory available to Photoshop Elements: 1598 MB
Memory used by Photoshop Elements: 69 %
Image tile size: 128K
Image cache levels: 8
Video Card: ATI Radeon HD 4800 Series
Video Mode: 1680 x 1050 x 4294967296 colors
Video Card Caption: ATI Radeon HD 4800 Series
Video Card Memory: 512 MB
Application folder: C:\Program Files\Adobe\Photoshop Elements 12\
Photoshop Elements scratch has async I/O enabled
Required Plug-ins folder: C:\Program Files\Adobe\Photoshop Elements 12\Required\
Primary Plug-ins folder: C:\Program Files\Adobe\Photoshop Elements 12\Plug-Ins\
The first thing I did was UPDATE. I have all the latest updates available (according to the updater). The Camera Raw Plug-in says it is version 8.0.
The RAW files are from a Canon T3i. It's a very common camera, I can't believe it wouldn't be supported.